<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>用户管理</el-breadcrumb-item>
      <el-breadcrumb-item>用户列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <el-row :gutter="20">
        <el-col :span="8">
          <!-- 搜索与添加区域 -->
          <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getUserList">
            <el-button slot="append" icon="el-icon-search" @click="getUserList"></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button type="primary" @click="addDialogVisible = true">添加用户</el-button>
        </el-col>
      </el-row>
      <!-- 用户列表区域 -->
      <el-table :data="userList" border stripe>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="姓名" prop="username"></el-table-column>
        <el-table-column label="邮箱" prop="email"></el-table-column>
        <el-table-column label="电话" prop="mobile"></el-table-column>
        <el-table-column label="角色" prop="role_name"></el-table-column>
        <el-table-column label="状态">
          <template slot-scope="scope">
            <el-switch v-model="scope.row.mg_state" @change="userStateChanged(scope.row)"></el-switch>
          </template>
        </el-table-column>
        <el-table-column label="操作" width="180px">
          <template slot-scope="scope">
            <!-- 修改 -->
            <el-button @click="showEditDialog(scope.row.id)" type="primary" icon="el-icon-edit" size="mini"></el-button>
            <!-- 删除 -->
            <el-button @click="removeUserById(scope.row.id)" type="danger" icon="el-icon-delete" size="mini">
            </el-button>
            <!-- 分配角色 -->
            <el-tooltip class="item" effect="dark" content="分配角色" placement="top" :enterable="false">
              <el-button type="warning" icon="el-icon-setting" size="mini" @click="setRole(scope.row)"></el-button>
            </el-tooltip>
          </template>
        </el-table-column>
      </el-table>
      <!-- 分页区域 -->
      <el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum" :page-sizes="[1, 2, 5, 10]" :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper" :total="total">
      </el-pagination>
    </el-card>

    <!-- 添加用户对话框 -->
    <el-dialog title="添加用户" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
      <!-- 内容主体区域 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px">
        <el-form-item label="用户名" prop="username">
          <el-input v-model="addForm.username"></el-input>
        </el-form-item>
        <el-form-item label="密码" prop="password">
          <el-input v-model="addForm.password" type="password"></el-input>
        </el-form-item>
        <el-form-item label="邮箱" prop="email">
          <el-input v-model="addForm.email"></el-input>
        </el-form-item>
        <el-form-item label="手机" prop="mobile">
          <el-input v-model="addForm.mobile"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addUser">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改用户对话框 -->
    <el-dialog title="修改用户" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed" :show-close="false"
      :close-on-click-modal="false">
      <!-- 内容主体区域 -->
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px">
        <el-form-item label="用户名" prop="username">
          <el-input v-model="editForm.username" disabled></el-input>
        </el-form-item>
        <el-form-item label="邮箱" prop="email">
          <el-input v-model="editForm.email"></el-input>
        </el-form-item>
        <el-form-item label="手机" prop="mobile">
          <el-input v-model="editForm.mobile"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUserInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配角色对话框 -->
    <el-dialog title="分配角色" @close="setRoleDialogClosed" :visible.sync="setRoleDialogVisible" width="50%" :close-on-click-modal="false">
      <!-- 内容主体区域 -->
      <div>
        <p>当前的用户： {{userInfo.username}}</p>
        <p>当前的角色： {{userInfo.role_name}}</p>
        <p>分配新角色：
          <el-select v-model="selectedRoleId" placeholder="请选择">
            <el-option v-for="item in rolesList" :key="item.id" :label="item.roleName" :value="item.id">
            </el-option>
          </el-select>
        </p>
      </div>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="saveRoleInfo">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
  export default {
    data() {
      // 邮箱验证规则
      var checkEmail = (rule, value, callback) => {
        const regEmail = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-])+/
        if (regEmail.test(value)) return callback() // 合法的邮箱
        callback(new Error('请输入合法的邮箱'))
      }
      // 手机号验证规则
      var checkMobile = (rule, value, callback) => {
        const regMobile = /^1[3456789]\d{9}$/
        if (regMobile.test(value)) return callback() // 合法的手机号
        callback(new Error('请输入合法的手机号'))
      }
      return {
        // 获取用户列表的参数对象
        queryInfo: {
          query: '',
          // 当前的页码
          pagenum: 1,
          // 每页显示几条数据
          pagesize: 2
        },
        userList: [],
        total: 0,
        // 控制添加用户对话框的显示和隐藏
        addDialogVisible: false,
        // 控制修改用户对话框的显示和隐藏
        editDialogVisible: false,
        // 控制"分配角色"对话框的显示和隐藏
        setRoleDialogVisible: false,
        // 添加用户的表单数据
        addForm: {
          username: '',
          password: '',
          email: '',
          mobile: ''
        },
        // 查询到的用户信息
        editForm: {},
        // 正在被操作的当前用户的信息
        userInfo: {},
        // 所有角色的数据列表
        rolesList: [],
        // 已选中的角色id值
        selectedRoleId: '',
        // 添加用户表单的验证规则
        addFormRules: {
          username: [
            { required: true, message: '请输入用户名', trigger: 'blur' },
            { min: 2, max: 10, message: '用户长度在 2 到 10 个字符', trigger: 'blur' }
          ],
          password: [
            { required: true, message: '请输入密码', trigger: 'blur' },
            { min: 6, max: 15, message: '用户长度在 6 到 15 个字符', trigger: 'blur' }
          ],
          email: [
            { required: true, message: '请输入电子邮箱', trigger: 'blur' },
            { validator: checkEmail, trigger: 'blur' }
          ],
          mobile: [
            { required: true, message: '请输入手机号码', trigger: 'blur' },
            { validator: checkMobile, trigger: 'blur' }
          ]
        },
        // 修改用户表单的验证规则
        editFormRules: {
          email: [
            { required: true, message: '请输入电子邮箱', trigger: 'blur' },
            { validator: checkEmail, trigger: 'blur' }
          ],
          mobile: [
            { required: true, message: '请输入手机号码', trigger: 'blur' },
            { validator: checkMobile, trigger: 'blur' }
          ]
        }
      }
    },
    created() {
      this.getUserList()
    },
    methods: {
      async getUserList() {
        const { data: res } = await this.$http.get('users', {
          params: this.queryInfo
        })
        if (res.meta.status !== 200) return this.$message.error('获取用户列表失败')
        this.userList = res.data.users
        this.total = res.data.total
        console.log(res)
      },
      // 监听 pagesize 改变
      handleSizeChange(newSize) {
        console.log('监听 pagesize 改变')
        console.log(newSize)
        this.queryInfo.pagesize = newSize
        this.getUserList()
      },
      // 监听页码值改变
      handleCurrentChange(newPage) {
        console.log('监听页码值改变')
        console.log(newPage)
        this.queryInfo.pagenum = newPage
        this.getUserList()
      },
      // 监听 switch 组件状态
      async userStateChanged(userInfo) {
        const { data: res } = await this.$http.put(`users/${userInfo.id}/state/${userInfo.mg_state}`)
        if (res.meta.status !== 200) {
          userInfo.mg_state = !userInfo.mg_state
          return this.$message.error('更新用户状态失败')
        }
        this.$message.success('更新用户状态成功')
      },
      // 监听添加用户对话框的关闭事件
      addDialogClosed() {
        this.$refs.addFormRef.resetFields()
      },
      // 点击按钮，添加新用户
      addUser() {
        this.$refs.addFormRef.validate(async valid => {
          if (!valid) return
          // 可以发起添加用户的网络请求
          const { data: res } = await this.$http.post('users', this.addForm)
          if (res.meta.status !== 201) return this.$message.error('添加用户失败')
          this.$message.success('添加用户成功')
          this.addDialogVisible = false
          // 重新获取用户列表数据
          this.getUserList()
        })
      },
      // 监听修改用户对话框的关闭事件
      editDialogClosed() {
        this.$refs.editFormRef.resetFields()
      },
      // 展示编辑用户的对话框
      async showEditDialog(id) {
        const { data: res } = await this.$http.get(`users/${id}`)
        if (res.meta.status !== 200) return this.$message.error('查询用户失败')
        this.editForm = res.data
        this.editDialogVisible = true
      },
      // 修改用户信息并提交
      editUserInfo() {
        this.$refs.editFormRef.validate(async valid => {
          if (!valid) return
          // 可以发起修改用户的网络请求
          const { data: res } = await this.$http.put(`users/${this.editForm.id}`, {
            email: this.editForm.email,
            mobile: this.editForm.mobile
          })
          if (res.meta.status !== 200) return this.$message.error('更新用户信息失败')
          // 关闭对话框
          this.editDialogVisible = false
          // 刷新数据列表
          this.getUserList()
          // 提示修改成功
          this.$message.success('更新用户信息成功')
        })
      },
      // 根据id删除用户信息
      async removeUserById(id) {
        // 弹窗提示用户是否需要删除该信息
        const confirmResult = await this.$confirm('此操作将永久删除该用户信息，是否继续？', '提示', {
          // confirmButtonText: '确定',
          // cancelButtonText: '取消',
          showClose: false,
          closeOnClickModal: false,
          type: 'warning'
        })
        .catch(err => err)
        if (confirmResult !== 'confirm') return this.$message.info('已取消删除')

        // 用户已确认删除, 发送删除请求
        const { data: res } = await this.$http.delete(`users/${id}`)

        if (res.meta.status !== 200) return this.$message.error('删除用户失败')
        this.$message.success('删除用户成功')
        // 删除成功后刷新用户列表数据
        this.getUserList()
      },
      // 显示分配角色权限的对话框
      async setRole(userInfo) {   
        this.userInfo = userInfo
        // 在展示对话框之前，获取所有角色的列表
        const { data: res } = await this.$http.get('roles')
        if (res.meta.status !== 200) return this.$message.error('获取角色列表失败')
        this.rolesList = res.data
        this.setRoleDialogVisible = true
      },
      // 点击按钮，分配角色
      async saveRoleInfo() {
        if(!this.selectedRoleId) return this.$message.error('请选择要分配的角色')
        const {data: res} = await this.$http.put(`users/${this.userInfo.id}/role`, {
          rid: this.selectedRoleId
        })
        if(res.meta.status !== 200) return this.$message.error('更新用户角色失败')
        this.$message.success('更新用户角色成功')
        this.getUserList()
        this.setRoleDialogVisible = false
      },
      // 关闭分配角色对话框时触发的事件
      setRoleDialogClosed() {
        // 关闭对话框前先将对其下拉菜单清空选择
        this.selectedRoleId = ''
        // 关闭对话框前先将对其正在被操作的当前用户的信息进行清空
        this.userInfo = {}
      }
    }
  }
</script>

<style lang="less" scoped>
</style>